/*********************************************************************************
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 * The MIT License (MIT)                                                         *
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 * Copyright (c) 2015-2020 aoju.org and other contributors.                      *
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package org.aoju.bus.goalie.builtin;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.handler.timeout.IdleState;
import io.netty.handler.timeout.IdleStateEvent;
import org.aoju.bus.goalie.ApiContext;
import org.aoju.bus.goalie.consts.NettyMode;
import org.aoju.bus.logger.Logger;

/**
 * netty心跳检测
 *
 * @author Kimi Liu
 * @version 6.0.9
 * @since JDK 1.8++
 */
public class HeartBeatClientHandler extends ChannelInboundHandlerAdapter {

    private static ChannelMessage CONFIG_MSG;

    static {
        ChannelMessage channelMessage = new ChannelMessage();
        channelMessage.setApp(ApiContext.getName());
        channelMessage.setCode(NettyMode.HEART_BEAT.getCode());
        CONFIG_MSG = channelMessage;
    }

    @Override
    public void userEventTriggered(ChannelHandlerContext ctx, Object evt) {
        if (evt instanceof IdleStateEvent) {
            IdleStateEvent event = (IdleStateEvent) evt;
            if (event.state() == IdleState.WRITER_IDLE) {
                Logger.debug("客户端发送心跳包");
                ctx.channel().writeAndFlush(CONFIG_MSG);
            }
        }
    }

}